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Design Considerations for Radial Key Retrofit

by Jan Seyler, Westinghouse Canada Inc, Burlington, Canada,



Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract:

A practise that is becoming more and more common is to retrofit hydro-electric generators with Radial Key Systems. There are significant design considerations that must be made to ensure that a radial key retrofit leads to trouble free operation of the generator. This paper discusses considerations related to stress, vibration and stability in the design of a radial key retrofit. A typical design is outlined along with a method of increasing stator radial stiffness without restraining stator frame thermal expansion.

Subject Headings: Rehabilitation | Vibration | Hydro power | Hydraulic design | Electrical equipment | Turbines | Thermal properties

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